Journal of electrochemical science and technology最新文献_第10页

A LiPF6-LiFSI Blended-Salt Electrolyte System for Improved Electrochemical Performance of Anode-Free Batteries 提高无阳极电池电化学性能的LiPF6-LiFSI混合盐电解质体系

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2021-08-13 DOI: 10.33961/jecst.2021.00535

Haeyoung Choi, Y. Bae, Sang-Min Lee, Y. Ha, H. Shin, Byung Gon Kim

{"title":"A LiPF6-LiFSI Blended-Salt Electrolyte System for Improved Electrochemical Performance of Anode-Free Batteries","authors":"Haeyoung Choi, Y. Bae, Sang-Min Lee, Y. Ha, H. Shin, Byung Gon Kim","doi":"10.33961/jecst.2021.00535","DOIUrl":"https://doi.org/10.33961/jecst.2021.00535","url":null,"abstract":"ANODE-free Li-metal batteries (AFLMBs) operating with Li of cathode material have attracted enormous attention due to their exceptional energy density originating from anode-free structure in the confined cell volume. However, uncontrolled dendritic growth of lithium on a copper current collector can limit its practical application as it causes fatal issues for stable cycling such as dead Li formation, unstable solid electrolyte interphase, electrolyte exhaustion, and internal short-circuit. To overcome this limitation, here, we report a novel dual-salt electrolyte comprising of 0.2 M LiPF 6 + 3.8 M lithium bis(flu-orosulfonyl)imide in a carbonate/ester co-solvent with 5 wt% fluoroethylene carbonate, 2 wt% vinylene carbonate, and 0.2 wt% LiNO 3 additives. Because the dual-salt electrolyte facilitates uniform/dense Li deposition on the current collector and can form robust/ionic conductive LiF-based SEI layer on the deposited Li, a Li/Li symmetrical cell exhibits improved cycling performance and low polarization for over 200 h operation. Furthermore, the anode-free LiFePO 4 /Cu cells in the carbonate electrolyte shows significantly enhanced cycling stability compared to the counterparts consisting of different salt ratios. This study shows an importance of electrolyte design guiding uniform Li deposition and forming stable SEI layer for AFLMBs.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2021-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41448261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Prelithiation of Alpha Phase Nanosheet-Type VOPO4·2H2O Anode for Lithium-Ion Batteries 锂离子电池α相纳米片型VOPO4·2H2O阳极的预锂化研究

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2021-07-19 DOI: 10.33961/JECST.2021.00577

A. Tron, J. Mun

引用次数: 1

Ion Migration in Metal Halide Perovskites 金属卤化物钙钛矿中的离子迁移

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2021-07-16 DOI: 10.33961/JECST.2021.00136

Anafi Nur’aini, Seokwon Lee, I. Oh

引用次数: 1

Ionic-additive Crosslinked Polymeric Sulfur Composites as Cathode Materials for Lithium-Sulfur Batteries 离子添加剂交联聚合硫复合材料作为锂硫电池正极材料

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2021-07-08 DOI: 10.33961/JECST.2021.00493

M. Seong, S. Manivannan, Kyuwon Kim, Taeeun Yim

{"title":"Ionic-additive Crosslinked Polymeric Sulfur Composites as Cathode Materials for Lithium-Sulfur Batteries","authors":"M. Seong, S. Manivannan, Kyuwon Kim, Taeeun Yim","doi":"10.33961/JECST.2021.00493","DOIUrl":"https://doi.org/10.33961/JECST.2021.00493","url":null,"abstract":"Lithium-sulfur (Li-S) batteries are one of attractive energy conversion and storage system based on high theoretical specific capacity and energy density with low costs. However, volatile nature of elemental sulfur is one of critical problem for their practical acceptance in industry because it considerably affects electrode uniformity during electrode manufacturing. In this work, polymeric sulfur composite consisting of ionic liquid (IL) are suggested to reduce volatility nature of elemental sulfur, resulting in better processibility of the Li-S cell. According to systematic spectroscopic analysis, it is found that polymeric sulfur is consisting of repeating units combining with elemental sulfur and volatility of them is negligible even at high temperature. In addition, the IL-embedded polymeric sulfur shows moderate cycle performance compared to the cell with elemental sulfur. From these results, it is found that the IL-embedded polymeric sulfur composite is applicable cathode candidate for the Li-S cell based on their excellent non-volatility as well as their superior electrochemical performance.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2021-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43773735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Embedding Cobalt Into ZIF-67 to Obtain Cobalt-Nanoporous Carbon Composites as Electrode Materials for Lithium ion Battery 将钴嵌入ZIF-67中制备钴纳米多孔碳复合材料作为锂离子电池电极材料

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2021-07-08 DOI: 10.33961/JECST.2020.01473

Guoxu Zheng, Jinghua Yin, Ziqiang Guo, Shi-Qi Tian, Xu Yang

{"title":"Embedding Cobalt Into ZIF-67 to Obtain Cobalt-Nanoporous Carbon Composites as Electrode Materials for Lithium ion Battery","authors":"Guoxu Zheng, Jinghua Yin, Ziqiang Guo, Shi-Qi Tian, Xu Yang","doi":"10.33961/JECST.2020.01473","DOIUrl":"https://doi.org/10.33961/JECST.2020.01473","url":null,"abstract":"Lithium ion batteries (LIBs) is a kind of rechargeable secondary battery, developed from lithium battery, lithium ions move between the positive and negative electrodes to realize the charging and discharging of external circuits. Zeolitic imidaz-olate frameworks (ZIFs) are porous crystalline materials in which organic imidazole esters are cross-linked to transition metals to form a framework structure. In this article, ZIF-67 is used as a sacrificial template to prepare nano porous carbon (NPC) coated cobalt nanoparticles. The final product Co/NPC composites with complete structure, regular morphology and uniform size were obtained by this method. The conductive network of cobalt and nitrogen doped carbon can shorten the lithium ion transport path and present high conductivity. In addition, amorphous carbon has more pores that can be fully in contact with the electrolyte during charging and discharging. At the same time, it also reduces the volume expansion during the cycle and slows down the rate of capacity attenuation caused by structure collapse. Co/NPC composites first discharge specific capacity up to 3115 mA h/g, under the current density of 200 mA/g, circular 200 reversible capacity as high as 751.1 mA h/g, and the excellent rate and resistance performance. The experimental results show that the Co/NPC composite material improves the electrical conductivity and electrochemical properties of the electrode. The cobalt based ZIF-67 as the precursor has opened the way for the design of highly performance electrodes for energy storage and electrochemical catalysis.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2021-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49372664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Operational Characteristics of High-Performance kW class Alkaline Electrolyzer Stack for Green Hydrogen Production 用于绿色制氢的高性能kW级碱性电解槽烟囱的运行特性

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2021-06-23 DOI: 10.33961/jecst.2021.00031

Baeck B. Choi, J. Jo, Taehee Lee, S. Jeon, Jungsu Kim, Y. Yoo

引用次数: 3

Detection of Unbalanced Voltage Cells in Series-connected Lithium-ion Batteries Using Single-frequency Electrochemical Impedance Spectroscopy 单频电化学阻抗谱法检测串联锂离子电池中的不平衡电压单元

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2021-06-18 DOI: 10.33961/jecst.2021.00115

N. Togasaki, T. Yokoshima, Yasumasa Oguma, T. Osaka

{"title":"Detection of Unbalanced Voltage Cells in Series-connected Lithium-ion Batteries Using Single-frequency Electrochemical Impedance Spectroscopy","authors":"N. Togasaki, T. Yokoshima, Yasumasa Oguma, T. Osaka","doi":"10.33961/jecst.2021.00115","DOIUrl":"https://doi.org/10.33961/jecst.2021.00115","url":null,"abstract":"For a battery module where single cells are connected in series, the single cells should each have a similar state of charge (SOC) to prevent them from being exposed to an overcharge or over-discharge during charge–discharge cycling. To detect the existence of unbalanced SOC cells in a battery module, we propose a simple measurement method using a single-frequency response of electrochemical impedance spectroscopy (EIS). For a commercially available graphite/nickel-cobaltaluminum-oxide lithium-ion cell, the cell impedance increases significantly below SOC20%, while the impedance in the medium SOC region (SOC20%–SOC80%) remains low with only minor changes. This impedance behavior is mostly due to the elementary processes of cathode reactions in the cell. Among the impedance values (Z, Z , Z ), the imaginary component of Z regarding cathode reactions changes heavily as a function of SOC, in particular, when the EIS measurement is performed around 0.1 Hz. Thanks to the significant difference in the time constant of cathode reactions between ≤SOC10% and ≥SOC20%, a single-frequency EIS measurement enlarges the difference in impedance between balanced and unbalanced cells in the module and facilitates an ~80% improvement in the detection signal compared to results with conventional EIS measurements.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42474921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Combined Effect of Catholyte Gap and Cell Voltage on Syngas Ratio in Continuous CO2/H2O Co-electrolysis 阴极间隙和电池电压对CO2/H2O连续共电解合成气比的影响

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2021-06-09 DOI: 10.33961/JECST.2021.00220

M. Ha, You-Me Na, Hee-Young Park, Hyoung‐Juhn Kim, Juhun Song, S. Yoo, Yong-Tae Kim, H. Park, J. Jang

引用次数: 2

Effect of Pseudomonas aeruginosa Strain ZK Biofilm on the Mechanical and Corrosion Behavior of 316L Stainless Steel and α-brass 铜绿假单胞菌ZK生物膜对316L不锈钢和α-黄铜力学和腐蚀行为的影响

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2021-06-09 DOI: 10.33961/JECST.2020.01718

A. Farooq, M. Zubair, H. Z. Wadood, K. M. Deen

{"title":"Effect of Pseudomonas aeruginosa Strain ZK Biofilm on the Mechanical and Corrosion Behavior of 316L Stainless Steel and α-brass","authors":"A. Farooq, M. Zubair, H. Z. Wadood, K. M. Deen","doi":"10.33961/JECST.2020.01718","DOIUrl":"https://doi.org/10.33961/JECST.2020.01718","url":null,"abstract":"This research work aims to investigate the effect of the aerobic bacterium, Pseudomonas aeruginosa on the mechanical and electrochemical properties of the 316L stainless steel and α-brass. These properties of both the alloys were determined after 7 days of exposure to the controlled and inoculated media at 37C. The microstructural and electrochemical test results revealed the deleterious effects of Pseudomonas aeruginosa. After exposure to the inoculated medium, the scanning electron microscopy (SEM) results showed the larger pitting and formation of relatively dense biofilm on α-brass compared to 316L stainless steel. The tensile strength and hardness of 316L stainless steel were slightly affected after exposure to the controlled and inoculated media. After exposure to the controlled medium and inoculated media, the tensile strength of the α-brass was least affected but a significant decrease in the hardness (from 165 HV to 124 HV) was observed due to the severe attack induced by the Pseudomonas aeruginosa. Similarly, the open-circuit potential of the 316L stainless steel in the inoculated medium was measured to be less active (-410 mV vs Ag/AgCl) than α-brass (-550 mV vs Ag/AgCl). In the inoculated medium, potentiodynamic polarization curves confirmed the severe attack of Pseudomonas aeruginosa on α-brass (7.15 × 10 mm/year) compared to 316L stainless steel which registered a corrosion rate of 5.14 × 10 mm/year.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2021-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48215934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Fabrication of a Full-Scale Pilot Model of a Cost-Effective Sodium Nickel-Iron Chloride Battery Over 40 Ah 成本效益高的40Ah以上氯化钠-镍-铁电池的全尺寸中试模型的制造

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2021-06-08 DOI: 10.33961/JECST.2021.00059

Dong-Geun Lee, B. Ahn, C. Ahn, Joon-Hwan Choi, Dae-han Lee, Sung-Ki Lim

引用次数: 2